Getting it to bloom

Why won't my Sea Spurge bloom? (and how to make it flower)

Also called Sea spurge, Sea euphorbia (Euphorbia paralias).

More about sea spurge

About Sea Spurge

Euphorbia paralias · also called Sea spurge, Sea euphorbia · flowering

Euphorbia paralias is a glaucous, blue-green coastal perennial in the family Euphorbiaceae, native to sandy beaches and coastal dunes around the Mediterranean, Atlantic coasts of Europe, and the Canary Islands. It forms compact, upright clumps of closely spaced, fleshy leaves arranged spirally on erect stems, and produces typical euphorboid yellowish-green cyathia in summer. It requires full sun, sharply drained sandy soil, and tolerates salt spray and drought exceptionally well. Like all Euphorbia species, it produces a caustic white latex sap and is toxic to both cats and dogs.

Plant type: flowering

The reasons sea spurge isn't blooming

Almost every non-blooming sea spurge traces back to one of these, roughly in order of how common they are:

Too little sun — most of these need full sun (or very bright light) to flower well; shade gives leaves, not blooms.
Too much nitrogen feed, driving lush foliage at the expense of flowers (very common with general or lawn feeds).
The plant has not been deadheaded, so it stops flowering once it sets seed.
Irregular watering — drought or waterlogging at the budding stage makes buds abort.
It is still too young or was checked by a transplant and is rebuilding before flowering.

Feeding sea spurge a high-nitrogen general feed and growing it in too little sun — you get a big leafy plant and almost no flowers.

The fix — how to get sea spurge to flower

Maximise sun. Give sea spurge the sunniest spot you have — for most bedding and fruiting plants, more direct light directly means more flowers.
Switch the feed. Move off high-nitrogen feeds and use a higher-potassium "bloom" or tomato-type feed as it comes into flower.
Deadhead regularly. Remove spent flowers often to keep it producing more rather than stopping to set seed.
Water consistently. Keep moisture even through budding and flowering — drought-then-flood swings make buds drop.

Light and feeding do most of the heavy lifting here. Dial in the spot with the light guide for sea spurge and get the feeding right with the sea spurge fertilising schedule — the wrong feed (too much nitrogen) is one of the most common silent reasons a healthy plant makes leaves instead of flowers.

Bloom season and what to expect

Sea Spurge flowers across its growing season (mostly summer) and, kept fed and deadheaded, can bloom for many weeks or right up to frost.

Post-bloom care so it flowers again

Deadhead, keep feeding lightly, and many will rebloom; collect seed from the best plants at the end of the season if you want to grow them again.

For everything else this plant needs day to day, see the full sea spurge care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Sea Spurge blooming — frequently asked questions

Why won't my sea spurge flower?

Sea Spurge blooms on the season's growth given enough sun, warmth and the right feed — there is no cold or photoperiod trick, just good growing conditions and a bloom-leaning feed. The most common reason it is not happening: Too little sun — most of these need full sun (or very bright light) to flower well; shade gives leaves, not blooms.

How do I make sea spurge bloom?

Give sea spurge the sunniest spot you have — for most bedding and fruiting plants, more direct light directly means more flowers. Move off high-nitrogen feeds and use a higher-potassium "bloom" or tomato-type feed as it comes into flower.

When does sea spurge normally bloom?